It was discovered that ffmpeg, Debian's version of the libav mediacodec suite, contains vulnerabilities in the DPCM codecs(CVE-2011-3951), H.264 (CVE-2012-0851), ADPCM (CVE-2012-0852), and theKMVC decoder (CVE-2011-3952).

In addition, this update contains bug fixes from the libav 0.5.9upstream release.

For the stable distribution (squeeze), these problems have been fixedin version 4:0.5.9-1.

For the unstable distribution (sid), these problems have been fixed inversion 6:0.8.3-1.

We recommend that you upgrade your ffmpeg packages.

Further information about Debian Security Advisories, how to applythese updates to your system and frequently asked questions can befound at: http://www.debian.org/security/